Discovery bank closing account

I gave disposition to discovery bank in April 23rd to close my bank account. I followed the consultant instructions and I was told all good, it will take about a week. The card was stopped so I had no more access to the account . I have reference email for that. In June I received an email that I owe them banking fees. I called the consultant and I was told that the previous consultant left it pending and she was going to reverse the charges and close it. Thereafter I got another email asking for money again, I called the consultant a d she said I need to pay the banking fees to close the account but she will ask to have the charges reversed and let me know. I got another email today saying that I must pay banking charges in order to close the account. Why must I be liable for banking charges of an account that I asked to be closed? I don't know their procedures but I followed the consultant instructions apparently was not enough. I will probably cancel discovery medical aid next year (after 22 years with them)as it is becoming extremely complicated and time consuming dealing with them